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STUDY ON DEVELOPING WASTEWATER PRETREATMENT BY CATALYTIC WET AIR OXIDATION

Lu Xiao

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Abstract

Feasibility of pretreatment technology on hospital developing wastewater by catalytic wet air oxidation(CWAO) was studied in this paper. It was concluded from UV spectrum that the representative pollutants such as methyl-p-aminophenol sulfate and hydroquinone were decomposed to micromolecules, and the organic compounds were decomposed more completely in existence of Ru/TiO_2 than that in absence of catalyst. The optimum reaction conditions were resulted that the dosage of catalyst was at 2g·l~(-1), the temperature was at 220℃, the pressure was at 1.5MPa and the pH was at 8.9 by researching the effects of these factors on CODCr removal rate. The CODCr removal rate was 62.5%, the chroma removal rate was 98% and the ratio of BOD_5/COD_(Cr) was improved from 0.07 to 0.45 under the optimum conditions.

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What this paper is about

Feasibility of pretreatment technology on hospital developing wastewater by catalytic wet air oxidation(CWAO) was studied in this paper. It was concluded from UV spectrum that the representative pollutants such as methyl-p-aminophenol sulfate and hydroquinone were decomposed to micromolecules, and the organic compounds were decomposed more completely in existence of Ru/TiO_2 than that in absence of catalyst. The optimum reaction conditions were resulted that the dosage of catalyst was at 2g·l~(-1), the temperature was at 220℃, the pressure was at 1.5MPa and the pH was at 8.9 by researching the effects of these factors on CODCr removal rate. The CODCr removal rate was 62.5%, the chroma removal rate was 98% and the ratio of BOD_5/COD_(Cr) was improved from 0.07 to 0.45 under the optimum conditions.

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Available abstract

Feasibility of pretreatment technology on hospital developing wastewater by catalytic wet air oxidation(CWAO) was studied in this paper. It was concluded from UV spectrum that the representative pollutants such as methyl-p-aminophenol sulfate and hydroquinone were decomposed to micromolecules, and the organic compounds were decomposed more completely in existence of Ru/TiO_2 than that in absence of catalyst. The optimum reaction conditions were resulted that the dosage of catalyst was at 2g·l~(-1), the temperature was at 220℃, the pressure was at 1.5MPa and the pH was at 8.9 by researching the effects of these factors on CODCr removal rate. The CODCr removal rate was 62.5%, the chroma removal rate was 98% and the ratio of BOD_5/COD_(Cr) was improved from 0.07 to 0.45 under the optimum conditions.

Key concepts: Wet oxidation, Hydroquinone, Catalysis, Wastewater, Chemistry, Pollutant, Sulfate, Environmental chemistry

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